Effect of thermal gradient on the creep on a rotating disc

Abstract

The effect of imposing linear thermal gradient on the steady state creep behavior of a rotating functionally graded Al-SiCp disc is investigated in the present study. Mathematical model to describe steady state creep behavior in rotating disc made of isotropic aluminum composite in presence of linear thermal gradient in the radial direction has been formulated. The steady state creep behavior of the disc has been determined following Sherby’s law. The distributions of stresses and strain rates have been obtained. The creep response of a composite disc with uniform temperature has also been computed for comparison with the results obtained for thermally graded discs. The study reveals that the distribution of stresses and strain rates in a rotating composite disc are significantly affected by different thermal gradations with in the disc. The creep stresses and steady state creep rates in a rotating thermally graded disc can be significantly reduced by optimal distribution in the disc.